Skip to main content

Hacking an analog clock to sync with NTP - Part 4

Assuming the jumper wires from the clock are connected to pins D1 and D2 on the ESP-12, the following Arduino sketch will make it function as a normal clock that ticks every second:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
tickPin = D1;
os_timer_t secTimer;

// Triggered by system timer every second
void timerCallback(void *pArg) {
  tickOccured = true;
}

void setup() {
  // Setup GPIO outputs
  pinMode(D1, OUTPUT);
  pinMode(D2, OUTPUT);
  digitalWrite(D1, LOW);
  digitalWrite(D2, LOW);

  // Start system timer which triggers every second
  os_timer_setfn(&secTimer, timerCallback, NULL);
  os_timer_arm(&secTimer, 1000, true);
}

void loop() {
  if (tickOccured) {
    tickOccurred - false;
    tickPin = (tickPin == D1 ? D2: D1);
    digitalWrite(tickPin, HIGH);
    delay(100);
    digitalWrite(tickPin, LOW);
    delay(100);
  }  
  delay(250);
}

To be continued...

Labels:

Comments

  1. Stephen18 November 2016 at 17:54

    You refer to D1 & D2 on your board, however I'm having trouble translating that to a normal ESP-12. Could you tell me which pins you have defaulted to using this diagram?

    http://simba-os.readthedocs.io/en/latest/_images/esp12e-pinout.png

    ReplyDelete
    Replies
    1. Random Sequence21 November 2016 at 19:15

      From this link:

      http://www.esp8266.com/viewtopic.php?f=21&t=1388

      I believe D1 = IO14, D2 = IO12

      Delete
  2. Rob De Almeida27 November 2016 at 13:05

    Thanks for sharing! I'm using this for an art project at the FB HQ.

    A few comments:

    Line 23 should be: tickOccurred = false;

    And in some places of the code there's a typo — you use "tickOccured" instead of "tickOccurred".

    ReplyDelete
    Replies
    1. Random Sequence29 November 2016 at 01:47

      Thanks for pointing out the spelling error. I have corrected it in the Github repo.

      Delete

Post a Comment

Popular posts from this blog

Update: Line adapter for Ozito Blade Trimmer

Update (Dec 2021): If you access to a 3D printer, I would now recommend this solution , which makes it super easy to replace the trimmer line. I have been using it for a few months now with zero issue.
5 comments
Read more

Line adapter for Ozito Blade Trimmer

This is an adapter for Ozito 18V battery trimmer (and possibly some Bosch trimmers as well) that uses a plastic blade for cutting. It lets you insert a 2.4mm trimmer line (about 8cm long) and use that for cutting. Simply cut a length of trimmer line and briefly heat up one end with a lighter so that a little bulb is formed. Then insert the trimmer line into the adapter and slot that into the trimmer as per normal. Make sure the trimmer line is not so long that it touches the safety guard. If that is the case, simply trim off any excess with a cutter or scissors. This part is best printed using PETG, which is a tougher and more flexible material. PLA is more rigid and breaks more easily. However, even with PETG, it will still break when it hits something really hard. Since this takes only 0.5m of material and 15 minutes to print, I will usually print a batch of nine at a time at very little cost. The blades that they sell do not break when it hits a hard object, but ...
Post a Comment
Read more

3D Printer Filament Joiner

I have been looking at various ways of joining 3D printing filaments. One method involves running one end of a filament through a short PTFE tubing, melting it with a lighter or candle, retracting it back into the tubing and immediately plunging the filament to be fused into the tubing: One problem with this method is that you can't really control the temperature at which you melt the filament, so you frequently end up with a brittle joint that breaks upon the slightest bend. Aliexpress even sells a contraption that works along the same line. As it uses a lighter or candle as well, it suffers from the same weakness. I am not even sure why you need a special contraption when a short PTFE tubing will work just as well. Another method involves using shrink tubing/aluminium foil, and a heat gun: But a heat gun is rather expensive, so I wanted to explore other alternatives. The candle + PTFE tubing method actually works quite well when you happen to melt it at the rig...
2 comments
Read more